I'm looking to build a pew for IPSC competition shooting. (Not for skirmishing)
Must be:
GBBR
Semi auto only
Accurate as possible to a max of 30m
2 joules maximum energy
Needs to have enough energy at 30m to punch through a cardboard target or knock down a small plate.
Currently looking at a TM MTR-16, putting in a 400mm tightbore barrel, green gas and bb's around .40 for the downrange energy.
Apart from replacing the nozzle return spring what else might I need to do to it?
TIA